func for sending messages to user terminals

src/class/Util.ts

@@ -1,3 +1,4 @@
+/* eslint-disable no-await-in-loop */
 /* eslint-disable no-param-reassign */
 import { promisify, inspect } from 'util';
 import childProcess from 'child_process';
@@ -7,6 +8,7 @@ import uuid from 'uuid/v4';
 import moment from 'moment';
 import fs from 'fs';
 import { Client } from '..';
+import { getUserByUid } from '../functions';
 import { AccountUtil, Command, RichEmbed } from '.';
 import { ModerationInterface, AccountInterface, Account } from '../models';
 
@@ -52,6 +54,30 @@ export default class Util {
     });
   }
 
+  public async sendMessageToUserTerminal(username: string, message: string): Promise<boolean> {
+    const ptsArray = await this.getPTS(username);
+    if (!ptsArray) return false;
+    for (const pts of ptsArray) {
+      const msg = `==SYSTEM NOTIFICATION | CLOUD SERVICES MANAGEMENT DAEMON==\n${new Date().toLocaleString('en-us')}\n\n${message}\n`;
+      await this.exec(`echo "${msg}" >> /dev/pts/${pts}`);
+    }
+    return true;
+  }
+
+  private async getPTS(username: string): Promise<number[] | undefined> {
+    const dir = await fs.promises.readdir('/dev/pts');
+    const returnArray: number[] = [];
+    for (const file of dir) {
+      const fileInformation = await fs.promises.stat(`/dev/pts/${file}`);
+      const user = await getUserByUid(this.client, fileInformation.uid);
+      if (user && user === username) {
+        returnArray.push(Number(file));
+      }
+    }
+    if (returnArray.length > 1) return undefined;
+    return returnArray;
+  }
+
 
   /**
    * Resolves a command